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/*
* Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*/
package com.sun.javafx.audio.windows.waveout;
import java.io.*;
class SoundBuffer {
private byte[] data;
private boolean needsByteSwap;
private int numBytes;
private int bytesPerSample;
private int numSamples;
private boolean playing;
private boolean empty;
// Note: needsByteSwap argument makes assumptions about the format
SoundBuffer(int size, int bytesPerSample, boolean needsByteSwap) {
this.bytesPerSample = bytesPerSample;
this.needsByteSwap = needsByteSwap;
data = new byte[size * bytesPerSample];
empty = true;
}
boolean playing() {
return playing;
}
void playing(boolean playing) {
this.playing = playing;
}
boolean empty() {
return empty;
}
void empty(boolean empty) {
this.empty = empty;
}
void fill(InputStream input) throws IOException {
synchronized(this) {
if (playing) {
throw new IllegalStateException("Can not fill a buffer that is playing");
}
}
empty(true);
int num = input.read(data);
if (num > 0) {
numBytes = num;
numSamples = numBytes / bytesPerSample;
empty(false);
if ((numBytes % bytesPerSample) != 0) {
System.out.println("WARNING: needed integral multiple of " + bytesPerSample +
" bytes, but read " + numBytes + " bytes");
}
} else {
numBytes = 0;
}
}
int numSamples() {
return numSamples;
}
// This is called by the mixer and must be extremely fast
// FIXME: may want to reconsider use of floating point at this point
// FIXME: assumes all sounds are of the same format to avoid normalization
float getSample(int sample) {
int startByte = sample * bytesPerSample;
// FIXME: assumes no more than 4 bytes per sample
int res = 0;
if (needsByteSwap) {
for (int i = startByte + bytesPerSample - 1; i >= startByte; i--) {
res <<= 8;
res |= (data[i] & 0xff);
}
} else {
int endByte = startByte + bytesPerSample - 1;
for (int i = startByte; i <= endByte; i++) {
res <<= 8;
res |= (data[i] & 0xff);
}
}
// Sign extend
if (bytesPerSample == 2) {
res = (short) res;
} else if (bytesPerSample == 1) {
res = (byte) res;
}
return (float) res;
}
}
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